The Attorney General has launched a bid to block a move to convict Blair over Iraq

District judge Michael Snow threw the bid out last year and said Blair has "immunity" from prosecution as any case would involve disclosing details under the Official Secrets Act.

But ar-Ribat is now pushing for a judicial review of the judge's decision and access to legal aid funding, prompting Wright to side with the judge and ask to formally join future hearings to reject the proposal.

The attorney general says any case is "hopeless", as "aggression" is not a crime in English law. The House of Lords agree.

"He is baffled as to why it is that despite the Chilcot report making it very clear that the war was illegal, attempts are now being made to prevent those responsible from entering a court, let alone being prosecuted for what they did."

Top barristers working for British troops killed in the conflict have also accused Blair of "misfeasance in public office" and suggest there is a strong case the former Prime Minister misled Parliament to justify invasion.

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